如果有任何参数属于string类型，则将该参数的小写版本添加一个新的参数列表中，并保留其他参数不变。
If any of the parameters are of type String, I add the lowercase version of it to a new arguments list, and leave the other arguments intact.
这就是所谓的驼峰式大小写风格(camel casing)，是Python和其他编程语言中广泛采用的一种技术，可使函数的名称更易阅读。
This approach is known as camel casing and is a popular technique used in Python (and other languages) to make it easier to read the names of functions.
它显示在其他用户的可执行标识中(最后的字符)的长目录清单，而且suid和sgid的大小写意义相同。
It is displayed in a long directory listing in the place of the executable flag for other users (the last character), with the same meaning for upper and lower case as for suid and sgid.
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